AirHint found the following cheapest one-way flights from Seoul (GMP) to Agana (GUM) in October 2025 (see full year).
One-Way flights
| 28 Oct | Eastar Jet | ||
| 31 Oct | Air Busan | ||
| 29 Oct | Korean Air | ||
| 30 Oct | Korean Air | ||
| 27 Oct | Korean Air |
Also check the deals for return flights from Seoul to Agana in October.
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